The Master Tow dolly looks like it uses drum brakes (see here:
https://www.mastertow.com/towdollies ).
The Acme EZE-Tow dolly uses vented disc brakes:
https://cartowdolly.com/tow-dolly-features/ I wonder if they can handle the heat a little better.
Sure I'm a little biased: We haven't had any issues with our EZE-Tow but then we also mostly tow in MI, OH, etc. (e.g. "flat" states). A few weeks ago we did return from a trip to DC and back which included driving through hilly PA without any dolly issues (yeah I know: The east coast's hills are nothing compared to the west coast's mountains).
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